Model:MARSSIM: Difference between revisions

Revision as of 11:45, 11 June 2009

Model type:	Modular for the terrestrial and coastal domain.
Description:	A landform evolution model operating at the drainage basin or larger scale. Recent model development has targeted planetary applications.

Supported platforms:	Linux, windows
Programming language:	Fortran90
Model was developed started from:	1990 and development still takes place
To what degree will the model become available:	Source code will be available. Model can also be used as teaching tool and executable will become available as well.
Current license type:	None
Memory requirements:	Variable - dynamic arrays
Typical run time:	hours to days

Input parameters:	Initial elevation file. File specifying boundary conditions, run time, process options, and parameter values.
Input format:	ASCII
Output parameters:	RAW image files of elevation and shaded relief. ASCII file of elevations at specified times. ASCII files of other state variables as desired at specified times. Iteration-by-iteration summary file
Output format:	ASCII
Post-processing software (if needed):	yes, Photoshop to produce movies. Conversions to a variety of data formats.
Visualization software (if needed):	yes, Surfer for topographic maps

Processes represented by model:	Bedrock fluvial incision (shear stress or sediment flux dependency). Mass wasting (creep and threshold-limited). Bedload sediment transport & deposition in streams, fans, deltas. Impact cratering, aeolian deposition, lava flows. Flow routing with evaporation from depressions.
Key physical parameters & equations:	Bedrock erodibility, mass wasting diffusivity, bed material grain size, flow hydrologic parameters, relative evaporation rate, cratering size distribution and rate, eolian deposition parameters, etc.
Length scale & resolution constraints:	Variable - targeted towards drainage basin or larger scales. Spatial scale determined by input parameter and run-time specification of array dimentions. Uses rectangular grid cells.
Time scale & resolution constraints:	Variable - Limited by computer speed.
Numerical limitations and issues :	Runs with grid sizes greater than about 600x600 may require many days on a PC. Model assumes fluvial streams have gradients determined by steady-state transport. Depositional stratigraphy not modeled.

Available calibration data sets:	None
Available test data sets:	Example runs for most types of simulation scenarios
Ideal data for testing:	None

Currently or plans for collaborating with:	Yes, at present primarily in the planetary community.

Key papers of the model:	Howard, A.D., 1994, A detachment-limited model of drainage basin evolution, Water Resources Research, 30(7) 2261-85. Howard, A.D., 2007, Simulating the development of martian highland landscapes..., Geomorphology, 91, 332-363.
Is there a manual available:	No
Model website if any:	http://erode.evsc.virginia.edu

Comments:	Users guide under development. Most recent model available from ah6p@virginia.edu.

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-| class="model_col2"| None
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 | class="model_col1"| Ideal data for testing: